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Method for machining pyrrhotite containing nickel ore

A technology for pyrrhotite and nickel ore, which is applied in the field of processing nickel ore containing pyrrhotite, and can solve the problems of unutilization of low-grade nickel concentrate, corrosion of equipment by alkaline pulp, and the impact of pentlandite on the floatability and other problems, to achieve the effect of clean and pollution-free raw materials, stable and convenient operation, and improved quality

Inactive Publication Date: 2018-02-09
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existence of pyrrhotite (or pyrite, the same below) in the development and utilization of nickel sulfide ore greatly reduces the grade of nickel concentrate, greatly increases the smelting cost of nickel concentrate, and even makes low-grade nickel concentrate unusable
In the prior art, the flotation separation of pyrrhotite and pentlandite is generally carried out in an alkaline medium, that is, adding lime to form a high-alkaline and high-calcium medium condition, forming an alkaline pulp, and making the pyrrhotite therein Iron ore is suppressed, but the buoyancy of pentlandite is also greatly affected, which greatly reduces the recovery rate of pentlandite
In addition, the process of making lime causes great damage to the environment, and the alkaline pulp formed by lime seriously corrodes the equipment. At the same time, the pH of the obtained mineral processing wastewater is relatively high, which greatly exceeds the pH allowable range of wastewater discharge stipulated by the state.

Method used

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  • Method for machining pyrrhotite containing nickel ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Crushing a nickel ore containing pyrrhotite in South Africa, the content of pentlandite in the ore is 6.9wt%, and the content of pyrrhotite is 45wt%, to obtain a crushed ore with a particle size not greater than 2mm; then The crushed ore is wet-milled with a ball mill containing stainless steel liners and balls to obtain a slurry with a concentration of 35wt% and a particle size of not higher than 0.074mm, accounting for 80%; then the collector butyl xanthate and foaming agent Methyl isobutyl carbinol was added to the pulp at a mass ratio of 100000:6:2, stirred for 3 minutes, and the pH value of the pulp became 8.2; finally, nickel concentrate and pyrrhotite were obtained by flotation for 6 minutes. The nickel grade of the nickel concentrate is 9.58%, and the nickel recovery rate reaches 85.6%.

Embodiment 2

[0038] A certain nickel ore containing pyrrhotite in Canada was crushed, the content of pentlandite in the ore was 1.68wt%, and the content of pyrrhotite was 12.43wt%, to obtain a crushed ore with a particle size not greater than 2mm; Then use a ball mill containing stainless steel liners and balls to wet-grind the crushed ore to obtain a slurry with a concentration of 35wt% and a particle size of no more than 0.074mm, accounting for 75%; then the collector butyl xanthate and foaming The agent methyl isobutyl carbinol was added to the pulp according to the mass ratio of 100000:7:2.5, stirred for 3 minutes, and the pH value of the pulp became 8.1; finally, the nickel concentrate and pyrrhotite were obtained by flotation for 7 minutes. The nickel grade of the nickel concentrate is 10.62%, and the nickel recovery rate reaches 75.6%.

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Abstract

The invention discloses a method for machining pyrrhotite containing nickel ore. The method comprises the steps that (1) the pyrrhotite containing nickel ore is subjected to smashing treatment so thatsmashed ore can be obtained; (2) the smashed ore is subjected to wet grinding treatment through a ball grinder so that ore pulp can be obtained, wherein a lining plate and balls of the ball grinder are all made of stainless steel; and (3) the ore pulp, sodium n-butylxanthate and methyl isobutyl carbinol are mixed and stirred and then subjected to floatation treatment so that nickel concentrate and pyrrhotite can be obtained separately. According to the method, no inhibitor needs to be added, the environment-friendly effect is achieved, moreover, the cost is low, operation is convenient, the grade and the recovery rate of the nickel concentrate are remarkably improved, and remarkable economical benefits are achieved.

Description

technical field [0001] The invention belongs to the metallurgical industry, in particular, the invention relates to a method for processing nickel ore containing pyrrhotite. Background technique [0002] The existence of pyrrhotite (or pyrite, the same below) in the development and utilization of nickel sulfide ore greatly reduces the grade of nickel concentrate, greatly increases the smelting cost of nickel concentrate, and even makes low-grade nickel concentrate unusable . In the prior art, the flotation separation of pyrrhotite and pentlandite is generally carried out in an alkaline medium, that is, adding lime to form a high-alkaline and high-calcium medium condition, forming an alkaline pulp, and making the pyrrhotite therein Iron ore is suppressed, but the buoyancy of pentlandite is also greatly affected, which greatly reduces the recovery rate of pentlandite. In addition, the process of making lime causes great damage to the environment, and the alkaline slurry form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00B02C21/00B02C17/22B03D103/02B02C17/10
CPCB02C17/10B02C17/22B02C21/00B03D1/00B03D2203/02
Inventor 于传兵刘志国郭素红王传龙
Owner CHINA ENFI ENGINEERING CORPORATION
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